CN108043145A - A kind of rapid punching injection coupling integrated flue gas purification technique of the difficult flue gas of complexity - Google Patents
A kind of rapid punching injection coupling integrated flue gas purification technique of the difficult flue gas of complexity Download PDFInfo
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- CN108043145A CN108043145A CN201711390453.XA CN201711390453A CN108043145A CN 108043145 A CN108043145 A CN 108043145A CN 201711390453 A CN201711390453 A CN 201711390453A CN 108043145 A CN108043145 A CN 108043145A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1456—Removing acid components
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1456—Removing acid components
- B01D53/1468—Removing hydrogen sulfide
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1456—Removing acid components
- B01D53/1481—Removing sulfur dioxide or sulfur trioxide
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/20—Halogens or halogen compounds
- B01D2257/204—Inorganic halogen compounds
- B01D2257/2045—Hydrochloric acid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/20—Halogens or halogen compounds
- B01D2257/204—Inorganic halogen compounds
- B01D2257/2047—Hydrofluoric acid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
Abstract
The invention discloses a kind of rapid punching injection coupling integrated flue gas purification techniques of difficult flue gas of complexity, and its step are as follows：A, pending flue gas is vertically fed into rapids through flue and rushes washing section；B, rapids rushes the bottom-up ejection washing absorption liquid of nozzle and flue gas high velocity impact that flows from above to below, carries out dust catching, the solution absorption of target components；C, continue downwards into scaling jet segment through the rapid flue gas for rushing washing section processing fully to collide again with bottleneck of the washing absorption liquid in scaling jet segment, micron, submicron order dust are trapped, further dissolve and absorb target components；D, after the flue gas by scaling jet segment processing and its drop of entrainment continue downwards into gas-liquid separator separates partial drop, flue gas is discharged from the top of gas-liquid separator.The present invention technique compared with common process, energy saving more than 30%, save equipment investment more than 35%, take up an area save more than 40%, dedusting detersive efficiency improve more than 5%~20%.
Description
Technical field
The present invention relates to fume treatment technical fields, refer in particular to be related to each class A fuel A, smelting, heat class kiln gas
Purification, washing, absorption and environmental protection treatment, it is specifically a kind of to remove particulate matter or heavy metal in flue gas, remove mesh in flue gas
Mark component, the difficult cigarette of complexity that can especially play the removing of the fine particle of high concentration physical property complexity better effects
The rapid punching injection coupling integrated flue gas purification technique of gas.
Background technology
The flue gas washing purifying and dedusting of all kinds of kiln discharges, target components（Such as common SO2、HF、HCl、NOx、H2S gas etc.）
Removing, recycling be always flue gas cleaning treatment important process process unit, there are many method：Such as void tower washing, purifying, filler
Tower washing, purifying, sieve-plate tower washing, purifying, tubulent contact tower washing, purifying, dynamic wave scrubbing purification, Venturi tube washing, purifying etc., but it is right
The Split assembled of a variety of methods is needed in difficult complicated high concentration dust-laden pellet object flue gas, and one-step method thoroughly purifies, always
It has difficulties.
The content of the invention
In order to solve the problems in the prior art, the purpose of the present invention is to provide particulate matter or a huge sum of money in a kind of removing flue gas
Belong to, remove target components in flue gas, preferable effect especially can be played to the removing of the fine particle of high concentration physical property complexity
The rapid punching injection coupling integrated flue gas purification technique of the difficult flue gas of complexity of fruit.
The purpose of the present invention is what is solved by the following technical programs：
A kind of rapid punching injection coupling integrated flue gas purification technique of the difficult flue gas of complexity, it is characterised in that：The step of the technique
It is rapid as follows：
A, containing the difficult physical property complex granule object of high concentration and need to purify absorb processing SO2、HF、HCl、NOx、H2One in S
The flue gas of kind target components or several target components is vertically fed into rapids through flue and rushes washing section；
B, the rapids that washing section middle and lower part is rushed positioned at rapids rushes the bottom-up washing absorption liquid that sprays of nozzle with quickly flowing from top to bottom
Flue gas high velocity impact, carry out dust catching, the solution absorption of target components；
C, the flue gas that washing section processing is rushed by rapids continues downwards into scaling jet segment, and rapids rinses the washing absorption washed under paragraph
Liquid fully collides again in the bottleneck of scaling jet segment with high speed kinetic energy flue gas, and micron, submicron order dust are trapped,
Further dissolve and absorb target components；
D, gas-liquid separator separates part liquid is continued downwards by scaling the flue gas of jet segment processing and its drop of entrainment
After drop, flue gas is discharged from the top of gas-liquid separator.
The step（a）In the difficult physical property complex granule object of high concentration refer to dustiness in 0.5g/m3~50g/m3And
Grain size is 0.01 μm~3.0 μm of dust.
The step（b）In rapids rush the bottom-up washing absorption liquid fluid column for spraying a height of 5m~7m of nozzle, fluid column spiral shell
Rotation shape, which rises and diffuses to be formed for the flue gas high velocity impact of 13m/s~30m/s with flow velocity from top to bottom in tiny droplet, to suspend
Foam-like gas-liquid mixed phase carries out dust catching, the solution absorption of target components.
The step（b）In rapids rush nozzle spouting liquid be 1.5L/m3~7.0L/m3。
The step（b）In rapids rush nozzle made of corrosion resistant alloy steel or engineering plastics F4/F46/HPE/FRP/SiC
The quantity that large opening nozzle and rapids rush nozzle is 1~6.
The step（c）In scaling jet segment be coaxially vertically arranged in the rapid lower section for rushing washing section, scale jet segment
Inner cavity necking down processing, the inlet angle for scaling jet segment is 20 °~30 °, the angle of outlet is that flue gas flow rate is at 7 °~15 ° and larynx neck
25m/s~50m/s, rapids rinse wash washing absorption liquid under paragraph scaling jet segment bottleneck fully with high speed kinetic energy flue gas
Side knock, longitudinal direction friction chopping progress flue gas pantographic jet cleaning are carried out, washing absorption liquid is dispersed as more tiny again
Droplet formation gas-liquid height mixes dispersive region, and micron, submicron order dust are trapped, and further dissolves and absorbs target group
Point.
The step（d）In gas-liquid separator in be equipped with rib bar type even distribution type liquid trap or demister, rib bar type is evenly distributed with
Formula liquid trap or demister are arranged on above the gas inlet of gas-liquid separator at 1.2m~6.0m and reach rib bar type even distribution type
The flue gas flow rate of liquid trap or demister is 0.8m/s~3.5m/s, and the flue gas of entrained drip is via rib bar type even distribution type liquid trap
Or demister removes partial drop, and flue gas is made to be uniformly dispersed out in the top of rib bar type even distribution type liquid trap or demister with profit
Sedimentation separation is assembled in drop.
The step（d）In rib bar type even distribution type liquid trap or demister individual layer set or multilayer set, individual layer set
When set above it Flushing nozzle, multilayer set when Flushing nozzle, and the inlet of Flushing nozzle and punching are set therebetween
Pipe is washed to be connected.
The step（d）In the bottom liquid storage area of gas-liquid separator rush nozzle with rapids by carrying the circulation pipe of circulating pump
Inlet be connected.
The fluid infusion and the fluid infusion that connection liquid supplementation pipe is equipped on the upside of the bottom liquid storage area of the gas-liquid separator are located at cigarette
The downside of gas import.
The circulating pump is disposed in parallel on circulation pipe.
The circulation pipe is managed equipped with collateral branch, and the port of export of collateral branch's pipe is connected with the feed(raw material)inlet of inspissator, online
Dirt mud in washing absorption liquid is carried out dense concentration and discharged outside washing absorption fluid circulation by operation；The inspissator overflows
Chute is connected by clear liquid pipe with liquid tank.
The liquid tank passes through the water curtain liquid supply pipe for carrying clear liquid pump and the rapid annular downflow weir phase for rushing washing section top
It connects, the clear liquid downlink in annular downflow weir forms water curtain to protect high-temperature flue gas on the rapid vertical inner tubal wall for rushing washing section
Impact erosion.
The step（d）In from the top of gas-liquid separator discharge flue gas in dust pellet grain object content in 0.05g/m3
~0.35g/m3, and last row smoke gas analysis equipment is equipped at the flue gas discharge opening at the top of gas-liquid separator.
The step（d）In gas-liquid separator at the top of flue gas discharge opening pass through smoke discharge tube and wet electrical dust precipitator
It is connected and carries out follow-up fume treatment, realizes the ultra-clean discharge of dedusting.
The rapids rushes washing section and scaling jet segment as integrated coupled structure up and down, scales bottom and the gas of jet segment
Liquid/gas separator is connected, and the rapids rushes washing section using corrosion resistant alloy steel, metal liner ceramic tile, graphite brick or high temperature resistant work
The compound of engineering plastics FRP/PP/PE/CPVC/PVD/PTFE or engineering plastics is made；The scaling jet segment is adopted
It is compound with corrosion resistant alloy steel, lead-antimony alloy or engineering plastics FRP/F4/F46/HPE/CPVC/SiC or engineering plastics
Object makes.
The present invention has the following advantages compared with prior art：
The present invention by the rapids being vertically arranged by rushing washing section and scaling jet segment is coupled into rapids and rushes jet scrubber to complicated difficult
Processing flue gas carries out washing, purifying and absorbs to handle simultaneously to carry out gas-liquid separation, and dust pellet grain object content exists in treated flue gas
0.05g/m3~0.35g/m3, compared with traditional smoke multistage washing process, equipment throwing is saved in energy-saving pump power consumption more than 30%
Money more than 35% takes up an area and saves more than 40%, dedusting detersive efficiency raising more than 5%~20%, and follow-up fume treatment can be by adding
Wet electrical dust precipitator is further processed to realize the ultra-clean discharge of dedusting；The technique gas cleaning intensity height, reduced investment, it is efficient and
Energy-saving effect is apparent, therefore suitable for promoting the use of.
Description of the drawings
Attached drawing 1 is rapid apparatus structure schematic diagram used by rushing injection coupling integrated flue gas purification technique of the invention.
Wherein：1-rapids rushes jet scrubber；2-annular downflow weir；3-rapids rushes washing section；4-rapids rushes nozzle；5-contracting
Put jet segment；6-gas-liquid separator；7-rib bar type even distribution type liquid trap or demister；8-Flushing nozzle；9-last row flue gas
Analytical equipment；10-flush pipe；11-liquid supplementation pipe；12-circulating pump；13-circulation pipe；14-collateral branch manages；15-inspissator；
16-clear liquid pipe；17-liquid tank；18-clear liquid pump；19-water curtain liquid supply pipe.
Specific embodiment
The present invention is further illustrated with embodiment below in conjunction with the accompanying drawings.
As shown in Figure 1：A kind of rapid punching injection coupling integrated flue gas purification technique of the difficult flue gas of complexity, the technique
Step is as follows：A, containing the difficult physical property complex granule object of high concentration and need to purify absorb processing SO2、HF、HCl、NOx、H2S
In a kind of target components or the flue gases of several target components be vertically fed into rapids through flue and rush washing section 3, middle and high concentration difficulty
Reason physical property complex granule object refers to dustiness in 0.5g/m3~50g/m3And the dust that grain size is 0.01 μm~3.0 μm, have simultaneously
The feature that toughness is big, hydrophily is not strong；B, positioned at rapids rush 3 middle and lower part of washing section rapids rush nozzle 4 it is bottom-up spray it is a height of
The washing absorption liquid fluid column of 5m~7m, it is 13m/s that fluid column helical form, which rises and diffuses in tiny droplet and flow velocity from top to bottom,
The flue gas high velocity impact of~30m/s forms suspension foam-like gas-liquid mixed phase, carries out dust catching, the dissolving of target components is inhaled
It receives；C, the flue gas that the processing of washing section 3 is rushed by rapids continues downwards into scaling jet segment 5, and rapids rushes the washing that washing section 3 is fallen and inhales
The bottleneck that liquid is received in scaling jet segment 5 fully carries out flue gas with high speed kinetic energy flue gas progress side knock, longitudinal direction friction chopping
Pantographic jet cleaning, washing absorption liquid are dispersed as more fine drop and form gas-liquid height mixing dispersive region again, to micron,
Submicron order dust is trapped, and further dissolves and absorbs target components；D, the flue gas and its folder handled by scaling jet segment 5
After the drop of band continues downwards into 6 separate section drop of gas-liquid separator, dust pellet grain object content is in 0.05g/m3~
0.35g/m3Flue gas from the top of gas-liquid separator 6 discharge.Rapids rushes washing section 3 and scaling jet segment 5 as integrated coupling up and down
Structure is closed, the bottom of scaling jet segment 5 is connected with gas-liquid separator 6, and wherein rapids rushes washing section 3 using corrosion resistant alloy steel, gold
Belong to the compound of lining ceramic tile, graphite brick or thermostability engineering plastic FRP/PP/PE/CPVC/PVD/PTFE or engineering plastics
Object is made, and rapids rushes 3 clear of washing section, washes away cleaning certainly, not deposition does not block, adaptation difficult physical property containing high concentration
The processing of the flue gas of complex granule object；Rapids rushes nozzle 4 and is made of corrosion resistant alloy steel or engineering plastics F4/F46/HPE/FRP/SiC
Large opening nozzle and the rapid quantity for rushing nozzle 4 be 1~6, the spouting liquid that rapids rushes nozzle 4 is 1.5L/m3~7.0L/m3；Scaling
Jet segment 5 is using corrosion resistant alloy steel, lead-antimony alloy or engineering plastics FRP/F4/F46/HPE/CPVC/SiC or engineering plastic
The compound of material is made, and scaling jet segment 5 is coaxial to be vertically arranged in the rapid lower section for rushing washing section 3, scales the interior of jet segment 5
Chamber necking down handles and Modular assembled can be used, scaling jet segment 5 inlet angle be 20 °~30 °, the angle of outlet be 7 °~15 ° and
Flue gas flow rate at larynx neck is 25m/s~50m/s, and scaling jet segment 5 makes full use of rapids to rush the washing absorption that washing section 3 is fallen
Liquid, without again with pumping liquid so as to saving energy consumption.
Rib bar type even distribution type liquid trap or demister 7 are equipped in above-mentioned technique, in gas-liquid separator 6 to improve gas-liquid point
From effect and the drop entrainment of discharge flue gas is reduced, rib bar type even distribution type liquid trap or demister 7 are arranged on the cigarette of gas-liquid separator 6
Above gas import at 1.2m~6.0m and reach the flue gas flow rate of rib bar type even distribution type liquid trap or demister 7 for 0.8m/s~
3.5m/s, rib bar type even distribution type liquid trap or 7 individual layer of demister are set or multilayer is set, and individual layer sets punching above it when setting
Flushing nozzle 8 is set therebetween when washing nozzle 8, multilayer setting, and the inlet of Flushing nozzle 8 is connected with flush pipe 10,
Flushing nozzle 8 is rinsed rib bar type even distribution type liquid trap or demister 7 to keep rib bar type even distribution type liquid trap or foam removal
For device 7 without deposition, the flue gas of entrained drip removes partial drop via rib bar type even distribution type liquid trap or demister 7, and makes flue gas
It is uniformly dispersed out in the top of rib bar type even distribution type liquid trap or demister 7 so that drop assembles sedimentation separation；In gas-liquid point
Bottom liquid storage area from device 6 is connected by carrying the circulation pipe 13 of circulating pump 12 with the rapid inlet for rushing nozzle 4, in general
Circulating pump 12 is disposed in parallel on circulation pipe 13；Connection liquid supplementation pipe 11 is equipped on the upside of the bottom liquid storage area of gas-liquid separator 6
Fluid infusion and the fluid infusion are located at the downside of gas inlet；Circulation pipe 13 be equipped with collateral branch's pipe 14, the port of export of collateral branch's pipe 14 with
Inspissator 15（Such as parallel flow setting vessel, circular cone settler, inclined plate settler, inclined tube settler）Feed(raw material)inlet be connected,
Dirt mud in washing absorption liquid is carried out dense concentration and discharged outside washing absorption fluid circulation by on-line operation, new by supplementing
Fresh liquid or absorbent keep the circulating fluid volume of washing absorption liquid and absorb power；The overflow launder of inspissator 15 by clear liquid pipe 16 with
Liquid tank 17 is connected；In addition liquid tank 17 rushes 3 top of washing section by carrying the water curtain liquid supply pipe 19 of clear liquid pump 18 with rapid
Annular downflow weir 2 is connected, and water curtain is formed on the vertical inner tubal wall that the clear liquid downlink in annular downflow weir 2 rushes washing section 3 in rapids
To protect the impact erosion of high-temperature flue gas.All discharges, supplement, addition and 6 memory hydraulic control system of gas-liquid separator are disposed as certainly
Dynamic or control manually.
Last row smoke gas analysis equipment 9 is equipped at the flue gas discharge opening at 6 top of gas-liquid separator simultaneously, passes through last row flue gas
Analytical equipment 9 measures dust content and target components content in the flue gas that gas-liquid separator 6 is discharged, and measurement flue gas passes through resistance
Drop adjusts pumping power and adjustment feed flow constituent content, to reach the purification and washing of setting or assimilation effect, so as to further carry
High washing, purifying assimilation effect.In addition the flue gas discharge opening at 6 top of gas-liquid separator can also pass through smoke discharge tube and wet type electricity
Deduster, which is connected, carries out follow-up fume treatment, realizes the ultra-clean discharge of dedusting.
During the process implementing of the present invention, containing the difficult physical property complex granule object of high concentration and absorption processing need to be purified
SO2、HF、HCl、NOx、H2The flue gas of a kind of target components or several target components in S is vertically fed into rapids through flue and rushes washing section
3；The rapids that 3 middle and lower part of washing section is rushed positioned at rapids rushes the bottom-up washing absorption liquid fluid column for spraying a height of 5m~7m of nozzle 4, fluid column
Helical form rise and diffuse formed in the flue gas high velocity impact that tiny droplet and flow velocity from top to bottom are 13m/s~30m/s it is outstanding
Floating foam-like gas-liquid mixed phase completes absorption absorption and adiabatic evaporation process in the fierce contact of this gas-liquid two-phase progress, carries out powder
Dirt trapping, the solution absorption of target components；The flue gas that the processing of washing section 3 is rushed by rapids continues downwards into scaling jet segment 5, rapid
Rush washing absorption liquid that washing section 3 falls the bottleneck of scaling jet segment 5 fully carried out with high speed kinetic energy flue gas side knock,
Longitudinal direction friction chopping carries out flue gas pantographic jet cleaning, and it is high that washing absorption liquid is dispersed as more fine drop formation gas-liquid again
Degree mixing dispersive region, gas-liquid mixture spread rapidly behind trunnion area, micron, submicron order dust are trapped, further
Dissolve and absorb target components；Gas-liquid separation is continued downwards by scaling the flue gas of the processing of jet segment 5 and its drop of entrainment
Device 6, after flue gas is by 7 separate section drop of rib bar type even distribution type liquid trap or demister, dust pellet grain object content exists
0.05g/m3~0.35g/m3Flue gas from the top of gas-liquid separator 6 discharge.Measure the dust of 6 exiting flue gas of gas-liquid separator
Content and target components content, measurement flue gas adjust pumping power and adjustment feed flow constituent content, adjustment pump supplies by resistance drop
Liquid measure and feed flow constituent content are the control of automatic or auto-manual, make exhaust gas dust pellet grain object content 0.05g/m after purification3~
0.35g/m3, to reach the purification and washing of setting or assimilation effect.Follow-up fume treatment can add wet electrical dust precipitator, and realization removes
The ultra-clean discharge of dirt.
Embodiment one
5000 tons/year of certain Kaldo Furnace processing precious metal anode mud, 7000~10000m of exhaust gas volumn3/ h, in flue gas containing lead oxide,
The powder such as selenium oxide, saltcake 15g/m3~40g/m3, 300~600 DEG C of smoke inlet temperature, SO in flue gas2Content 31500mg/Nm3
And a small amount of HF, HCl, NOx, H2Se etc. need to purify absorption processing.Annular 2 cloth water curtain of downflow weir protects smoke pipe inner wall, high temperature cigarette
Gas rushes washing section 3 through annular downflow weir 2 into rapids, and the washing absorption liquid sent out herein with circulating pump 12 rushes nozzle through big opening rapids
4 spray, and flue gas forms suspension dynamic foam area with washing absorption liquid, and absorption absorption is completed in the fierce contact of this gas-liquid two-phase progress
And adiabatic evaporation process, gas-liquid mixture are run downwards into scaling jet segment 5, gas-liquid is compressed herein to be dissipated by spray laser printer for more
Fine and closely woven contact dispersive region, gas-liquid mixture are spread rapidly through trunnion area, the drop of flue gas and its entrainment leave scaling jet segment 5 into
Enter gas-liquid separator 6 and carry out initial gross separation, after flue gas is by rib bar type even distribution type liquid trap or demister 7, gas-liquid is further
Separation；To ensure the cleaning of rib bar type even distribution type liquid trap or demister 7, Flushing nozzle 8 is set periodically to be rinsed to it.It is rapid
The flue internal diameter of washing section 3 is rushed as 600mm, flue gas flow rate 25m/s, the spray volume that rapids rushes nozzle 4 is 105m3/h；Contracting
Put that internal diameter at the larynx neck of jet segment 5 is 375mm, flue gas flow rate is 40m/s at larynx neck, the internal diameter of gas-liquid separator 6 is 2500mm.
The circulation pipe 13 of conveying washing absorption liquid sets collateral branch's pipe 14（10m3/h）To deep-cone settling slot（Φ5000×8200）
Dirt mud in washing absorption liquid is carried out dense concentration by solid mud dirt by feed liquor, on-line operation in time by advection gravitational settler
And it discharges outside circulation fluid system；The circulating fluid volume of washing absorption liquid and absorption power are kept by supplementing new water or soda.
The dust content and target components content, measurement flue gas for measuring 6 exiting flue gas of gas-liquid separator pass through resistance drop, survey
The pH value ≈ 2-3 of washing absorption liquid are measured, control the density p ≈ 1.05~1.25 of washing absorption liquid, adjust pumping power and adjustment
Feed flow constituent content, to reach the purification and washing of setting or assimilation effect；It is automatic to adjust pumping power and feed flow constituent content
Or auto-manual control, make exhaust gas dust pellet grain object content≤0.35g/m after purification3.Follow-up fume treatment can be by adding
One section of wet electrical dust precipitator, a desulfurizing tower, an electrostatic precipitator so that dirt≤5mg/m in the flue gas finally discharged3、SO2Contain
Amount≤20mg/m3, acid mist≤5mg/m3, realize the ultra-clean discharge of dedusting.
Embodiment two
Certain produces 400000 tons of pyrite-based sulfuric acid production factories per year, goes out boiler and multi-tube dust cleaner exhaust gas volumn 115000m3/ h, containing iron oxide, oxidation
The dust such as silicon, calcium oxide, aluminium oxide, magnesia 15g/m3~20g/m3, 300~360 DEG C of smoke inlet temperature, flue gas SO2Content
11%, containing a small amount of HF, HCl, SO in flue gas3 It is handled etc. absorption need to be purified.Annular 2 cloth water curtain of downflow weir protects smoke pipe inner wall,
High-temperature flue gas rushes washing section 3 through annular downflow weir 2 into rapids, rapid through big opening with the washing absorption liquid that circulating pump 12 is sent out herein
It rushes nozzle 4 to spray, flue gas forms suspension dynamic foam area with washing absorption liquid, and carrying out fierce contact in this gas-liquid two-phase completes to inhale
Attached absorption and adiabatic evaporation process, gas-liquid mixture are run downwards into scaling jet segment 5, and gas-liquid is compressed herein by spray laser printer
It dissipates for finer and closely woven contact dispersive region, gas-liquid mixture is spread rapidly through trunnion area, and the drop of flue gas and its entrainment leaves scaling spray
It penetrates section 5 and carries out initial gross separation, after flue gas is by rib bar type even distribution type liquid trap or demister 7, gas-liquid into gas-liquid separator 6
Further separation；To ensure the cleaning of rib bar type even distribution type liquid trap or demister 7, Flushing nozzle 8 is set periodically to be carried out to it
It rinses.Rapids rushes the flue internal diameter of washing section 3 as 1850mm, flue gas flow rate 25m/s, and the spray volume that rapids rushes nozzle 4 is
1200m3/h；Internal diameter is 1400mm at the larynx neck of scaling jet segment 5, flue gas flow rate is 36m/s at larynx neck.
The circulation pipe 13 of conveying washing absorption liquid sets collateral branch's pipe 14（60m3/h）Center driving subsider is bored to deep（Φ9000
×10500）Dirt mud in washing absorption liquid is carried out solid mud dirt by advection gravitational settler by feed liquor, on-line operation in time
It is dense to concentrate and discharge outside circulation fluid system；It keeps the circulating fluid volume of washing absorption liquid and absorbs to move by supplementing new water or soda
Power.
The dust content and target components content, measurement flue gas for measuring 6 exiting flue gas of gas-liquid separator pass through resistance drop, survey
The content of washing absorption liquid molten sulfur acid is measured as 10%~15%, controls the density p ≈ 1.05 of washing absorption liquid, adjustment pumping power and
Feed flow constituent content is adjusted, to reach the purification and washing of setting or assimilation effect；Adjustment pumping power and feed flow constituent content are
The control of automatic or auto-manual, makes exhaust gas dust pellet grain object content≤0.10g/m after purification3.Follow-up fume treatment can pass through
Add one-step cooling packed tower, two-stage wet electrical dust precipitator so that dirt≤2mg/m in the flue gas finally discharged3, F contents≤
0.5mg/m3、As≤1.0mg/m3, acid mist≤5mg/m3, realize the downward workshop section's conveying of decontamination index.
The present invention by the rapids being vertically arranged by rushing washing section and scaling jet segment is coupled into rapids and rushes jet scrubber to multiple
Miscellaneous difficult flue gas carries out washing, purifying and absorbs to handle simultaneously to carry out gas-liquid separation, dust pellet grain object content in treated flue gas
In 0.05g/m3~0.35g/m3, compared with traditional smoke multistage washing process, equipment is saved in energy-saving pump power consumption more than 30%
Investment more than 35% takes up an area and saves more than 40%, dedusting detersive efficiency raising more than 5%~20%, and follow-up fume treatment can be by adding
If wet electrical dust precipitator is further processed to realize the ultra-clean discharge of dedusting；It is the technique gas cleaning intensity height, reduced investment, efficient
And energy-saving effect is apparent, therefore suitable for promoting the use of.
Above example is merely illustrative of the invention's technical idea, it is impossible to protection scope of the present invention is limited with this, it is every
According to technological thought proposed by the present invention, any change done on the basis of technical solution each falls within the scope of the present invention
Within；The technology that the present invention is not directed to can be realized by the prior art.
Claims (16)
1. a kind of rapid punching injection coupling integrated flue gas purification technique of difficult flue gas of complexity, it is characterised in that：The technique
Step is as follows：
A, containing the difficult physical property complex granule object of high concentration and need to purify absorb processing SO2、HF、HCl、NOx、H2One in S
The flue gas of kind target components or several target components is vertically fed into rapids through flue and rushes washing section；
B, the rapids that washing section middle and lower part is rushed positioned at rapids rushes the bottom-up washing absorption liquid that sprays of nozzle with quickly flowing from top to bottom
Flue gas high velocity impact, carry out dust catching, the solution absorption of target components；
C, the flue gas that washing section processing is rushed by rapids continues downwards into scaling jet segment, and rapids rinses the washing absorption washed under paragraph
Liquid fully collides again in the bottleneck of scaling jet segment with high speed kinetic energy flue gas, and micron, submicron order dust are trapped,
Further dissolve and absorb target components；
D, gas-liquid separator separates part liquid is continued downwards by scaling the flue gas of jet segment processing and its drop of entrainment
After drop, flue gas is discharged from the top of gas-liquid separator.
2. the rapid punching injection coupling integrated flue gas purification technique of the difficult flue gas of complexity according to claim 1, special
Sign is：The step（a）In the difficult physical property complex granule object of high concentration refer to dustiness in 0.5g/m3~50g/m3And
Grain size is 0.01 μm~3.0 μm of dust.
3. the rapid punching injection coupling integrated flue gas purification technique of the difficult flue gas of complexity according to claim 1, special
Sign is：The step（b）In rapids rush the bottom-up washing absorption liquid fluid column for spraying a height of 5m~7m of nozzle, fluid column spiral
Shape rises and diffuses forms the bubble that suspends with flow velocity from top to bottom in tiny droplet for the flue gas high velocity impact of 13m/s~30m/s
Foam shape gas-liquid mixed phase carries out dust catching, the solution absorption of target components.
4. the rapid punching injection coupling integrated flue gas purification technique of the difficult flue gas of complexity according to claim 1 or 3,
It is characterized in that：The step（b）In rapids rush nozzle spouting liquid be 1.5L/m3~7.0L/m3。
5. the rapid punching injection coupling integrated flue gas purification technique of the difficult flue gas of complexity according to claim 1 or 3,
It is characterized in that：The step（b）In rapids rush nozzle and be made of corrosion resistant alloy steel or engineering plastics F4/F46/HPE/FRP/SiC
Large opening nozzle and the rapid quantity for rushing nozzle be 1~6.
6. the rapid punching injection coupling integrated flue gas purification technique of the difficult flue gas of complexity according to claim 1, special
Sign is：The step（c）In scaling jet segment be coaxially vertically arranged in the rapid lower section for rushing washing section, scale the interior of jet segment
Chamber necking down is handled, and the inlet angle for scaling jet segment is 20 °~30 °, the angle of outlet is that flue gas flow rate is 25m/ at 7 °~15 ° and larynx neck
S~50m/s, the washing absorption liquid that rapids flushing is washed under paragraph are fully carried out in the bottleneck of scaling jet segment with high speed kinetic energy flue gas
Side knock, longitudinal direction friction chopping carry out flue gas pantographic jet cleaning, and washing absorption liquid is dispersed as more fine drop again
Gas-liquid height mixing dispersive region is formed, micron, submicron order dust are trapped, further dissolve and absorb target components.
7. the rapid punching injection coupling integrated flue gas purification technique of the difficult flue gas of complexity according to claim 1, special
Sign is：The step（d）In gas-liquid separator in be equipped with rib bar type even distribution type liquid trap or demister, rib bar type even distribution type
Liquid trap or demister are arranged on above the gas inlet of gas-liquid separator at 1.2m~6.0m and reach rib bar type even distribution type and catch
The flue gas flow rate of liquid device or demister is 0.8m/s~3.5m/s, the flue gas of entrained drip via rib bar type even distribution type liquid trap or
Demister remove partial drop, and flue gas is made to be uniformly dispersed out in the top of rib bar type even distribution type liquid trap or demister in favor of
Drop assembles sedimentation separation.
8. the rapid punching injection coupling integrated flue gas purification technique of the difficult flue gas of complexity according to claim 7, special
Sign is：The step（d）In rib bar type even distribution type liquid trap or demister individual layer set or multilayer set, individual layer set when
Flushing nozzle, and the inlet of Flushing nozzle and flushing are set therebetween when Flushing nozzle, multilayer being set to set above it
Pipe is connected.
9. the rapid punching injection coupling integrated flue gas purification technique of the difficult flue gas of complexity according to claim 1 or 7,
It is characterized in that：The step（d）In the bottom liquid storage area of gas-liquid separator pass through and carry the circulation pipe of circulating pump and sprayed with rapid punching
The inlet of head is connected.
10. the rapid punching injection coupling integrated flue gas purification technique of the difficult flue gas of complexity according to claim 9, special
Sign is：The fluid infusion and the fluid infusion that connection liquid supplementation pipe is equipped on the upside of the bottom liquid storage area of the gas-liquid separator are located at flue gas
The downside of import.
11. the rapid punching injection coupling integrated flue gas purification technique of the difficult flue gas of complexity according to claim 9, special
Sign is：The circulating pump is disposed in parallel on circulation pipe.
12. the rapid punching injection coupling integrated flue gas purification technique of the difficult flue gas of complexity according to claim 9, special
Sign is：The circulation pipe is managed equipped with collateral branch, and the port of export of collateral branch's pipe is connected with the feed(raw material)inlet of inspissator, online to transport
The dirt mud being about in washing absorption liquid carries out dense concentration and discharges outside washing absorption fluid circulation；The overflow of the inspissator
Slot is connected by clear liquid pipe with liquid tank.
13. the rapid punching injection coupling integrated flue gas purification technique of the difficult flue gas of complexity according to claim 12,
It is characterized in that：The liquid tank passes through the water curtain liquid supply pipe for carrying clear liquid pump and the rapid annular downflow weir phase for rushing washing section top
It connects, the clear liquid downlink in annular downflow weir forms water curtain to protect high-temperature flue gas on the rapid vertical inner tubal wall for rushing washing section
Impact erosion.
14. the rapid punching injection coupling integrated flue gas purification technique of the difficult flue gas of complexity according to claim 1, special
Sign is：The step（d）In from the top of gas-liquid separator discharge flue gas in dust pellet grain object content in 0.05g/m3
~0.35g/m3, and last row smoke gas analysis equipment is equipped at the flue gas discharge opening at the top of gas-liquid separator.
15. the rapid punching injection coupling integrated flue gas purification technique of the difficult flue gas of complexity according to claim 1, special
Sign is：The step（d）In gas-liquid separator at the top of flue gas discharge opening pass through smoke discharge tube and wet electrical dust precipitator
It is connected and carries out follow-up fume treatment, realizes the ultra-clean discharge of dedusting.
16. the rapid punching injection coupling integrated flue gas purification technique of the difficult flue gas of complexity according to claim 1, special
Sign is：The rapids rushes washing section and scaling jet segment as integrated coupled structure up and down, scales bottom and the gas of jet segment
Liquid/gas separator is connected, and the rapids rushes washing section using corrosion resistant alloy steel, metal liner ceramic tile, graphite brick or high temperature resistant work
The compound of engineering plastics FRP/PP/PE/CPVC/PVD/PTFE or engineering plastics is made；The scaling jet segment is adopted
It is compound with corrosion resistant alloy steel, lead-antimony alloy or engineering plastics FRP/F4/F46/HPE/CPVC/SiC or engineering plastics
Object makes.
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| CN111514703A (en) * | 2020-04-30 | 2020-08-11 | 上海化工研究院有限公司 | Deep purification treatment device and process for tail gas discharged by fiberboard production line |
| CN111760422A (en) * | 2020-06-30 | 2020-10-13 | 双盾环境科技有限公司 | Variable-flow turbulent bubble type pre-absorption process for removing sulfur dioxide by flue gas organic amine method |
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